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Discussion

UFR and adequacy

Can someone explain this one to me? Maybe it's dialysis 101 but I honestly don't remember. The details probably don't matter but the patient had no reason to run yellow amp. (Good AVF, long run, 14g, etc) usually set to run even, no fluid gains between treatments. Always had us scratching out heads as to why he still ran yellow. Someone suggested flushing/bolusing to make the UFR >300. Lol and behold, green amp with UFR of 350.

I can't figure out why this is? I thought with high flux dialyzers, you didn't need a min UFR. Or was it all just a coincidence?

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    The dreaded "backflow" demon. With high flux filters there is a concern that if a minimum UF rate is not set there will be some flow of dialysate into the blood circuit. Fresenius machines even have a setting of high flow/no high flow which alters the TMP alarms. Some feel backflow is an urban legend. I do know that with reduced UF removal rates there is a decrease in convection which theoretically should reduce solute removal.

    Dialysis Urban Legends: The Minimum Ultrafiltration Rate (HemoDoc, From Doctor to Patient)

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    Just don't dump the prime. Remove it during the tx. along with the rinse back volume.

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